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Finding the Fourth Proportional to 205,054.60, 307,581.90 and 125,912.20

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Solution

The fourth proportional to 205,054.60, 307,581.90 and 125,912.20 is: 188,868.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,054.60 : 307,581.90 = 125,912.20 : x
  2. Step 2: Convert to fraction form
    205,054.60/307,581.90 = 125,912.20/x
  3. Step 3: Cross multiply
    205,054.60x = 307,581.90 × 125,912.20
  4. Step 4: Simplify right side
    205,054.60x = 38,728,313,709.18
  5. Step 5: Solve for x
    x = 38,728,313,709.18/205,054.60
  6. Step 6: Final answer
    x = 188,868.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.